diff --git a/include/programmer.h b/include/programmer.h
index b19049e..3270e0e 100644
--- a/include/programmer.h
+++ b/include/programmer.h
@@ -292,6 +292,8 @@
 #define SPI_MASTER_QPI			(1U << 6)  /**< Can send commands with quad i/o */
 #define SPI_MASTER_DTR_IN		(1U << 7)  /**< Double Transfer Rate: Can read two bits
 							per clock cycle per line */
+#define SPI_MASTER_TOP_ALIGNED		(1U << 8)  /**< Use addresses at the top of address space,
+							i.e. 2^24-flash_size .. 2^24-1 */
 
 /* Shorthands: */
 #define SPI_MASTER_DUAL			(SPI_MASTER_DUAL_IN | SPI_MASTER_DUAL_IO)
@@ -533,6 +535,10 @@
 {
 	return flash->mst.spi->features & SPI_MASTER_QPI;
 }
+static inline bool spi_master_top_aligned(const struct flashctx *const flash)
+{
+	return flash->mst.spi->features & SPI_MASTER_TOP_ALIGNED;
+}
 
 /* usbdev.c */
 struct libusb_device_handle;